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Fair Value Disclosure (Tables)
12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]
 
 
 
 
December 31, 2015
 
December 31, 2014
 
 
Fair Value Hierarchy
 
Carrying Value
 
Estimated Fair Value
 
Carrying Value
 
Estimated Fair Value
 
 
 
 
 
 
 
 
 
 
 
Convertible Notes
 
Level 2
 
$
78,192

 
$
74,449

 
$
76,695

 
$
76,695

Earnout liability
 
Level 3
 
$
1,425

 
$
1,425

 
$
2,196

 
$
2,196